An air diffuser or membrane diffuser is an aeration device typically in the shape of a disc, tube or plate, which is used to transfer air and with that oxygen into sewage or industrial wastewater. Oxygen is required by microorganisms/bacteria residents in the water to break down the pollutants. Diffusers use either rubber membranes or ceramic elements typically and produce either fine or coarse bubbles.

Air diffusers are used in biological treatment of wastewater which works on the principal of diffusion of air in liquid phase through air bubbles, broadly classified into fine and coarse bubble diffuser to meet the application suitability, engineering requirements, and economics of plant. This system is also known as Diffused Aeration Systems.


  • Low Initial Capital Costs.
  • Low Operating Costs.
  • Low Energy Cost/Consumption.
  • Reliable Performance.
  • Resistance to corrosion.
  • Robust in nature